Added use of a configuration to tests/vm/basevm.py. The configuration provides parameters used to configure a VM. This allows for providing alternate configurations to the VM being created/launched. cpu, machine, memory, and NUMA configuration are all examples of configuration which we might want to vary on the VM being created or launched. This will for example allow for creating an aarch64 vm.
Signed-off-by: Robert Foley <robert.fo...@linaro.org> Reviewed-by: Peter Puhov <peter.pu...@linaro.org> --- tests/vm/basevm.py | 108 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 82 insertions(+), 26 deletions(-) diff --git a/tests/vm/basevm.py b/tests/vm/basevm.py index 3b4403ddcb..ec92c8f105 100755 --- a/tests/vm/basevm.py +++ b/tests/vm/basevm.py @@ -32,15 +32,40 @@ import shutil import multiprocessing import traceback -SSH_KEY = open(os.path.join(os.path.dirname(__file__), - "..", "keys", "id_rsa")).read() -SSH_PUB_KEY = open(os.path.join(os.path.dirname(__file__), - "..", "keys", "id_rsa.pub")).read() - +SSH_KEY_FILE = os.path.join(os.path.dirname(__file__), + "..", "keys", "id_rsa") +SSH_PUB_KEY_FILE = os.path.join(os.path.dirname(__file__), + "..", "keys", "id_rsa.pub") +SSH_KEY = open(SSH_KEY_FILE).read() +SSH_PUB_KEY = open(SSH_PUB_KEY_FILE).read() + +# This is the standard configuration. +# Any or all of these can be overridden by +# passing in a config argument to the VM constructor. +DEFAULT_CONFIG = { + 'cpu' : "max", + 'machine' : 'pc', + 'guest_user' : "qemu", + 'guest_pass' : "qemupass", + 'root_pass' : "qemupass", + 'ssh_key_file' : SSH_KEY_FILE, + 'ssh_pub_key_file': SSH_PUB_KEY_FILE, + 'memory' : "4G", + 'extra_args' : [], + 'dns' : "", + 'ssh_port' : 0, + 'install_cmds' : "", + 'boot_dev_type' : "block", + 'ssh_timeout' : 1, +} +BOOT_DEVICE = { + 'block' : "-drive file={},if=none,id=drive0,cache=writeback "\ + "-device virtio-blk,drive=drive0,bootindex=0", + 'scsi' : "-device virtio-scsi-device,id=scsi "\ + "-drive file={},format=raw,if=none,id=hd0 "\ + "-device scsi-hd,drive=hd0,bootindex=0", +} class BaseVM(object): - GUEST_USER = "qemu" - GUEST_PASS = "qemupass" - ROOT_PASS = "qemupass" envvars = [ "https_proxy", @@ -59,19 +84,26 @@ class BaseVM(object): poweroff = "poweroff" # enable IPv6 networking ipv6 = True - def __init__(self, debug=False, vcpus=None): + def __init__(self, debug=False, vcpus=None, config=None): self._guest = None + # Allow input config to override defaults. + self._config = DEFAULT_CONFIG.copy() + if config != None: + self._config.update(config) self._tmpdir = os.path.realpath(tempfile.mkdtemp(prefix="vm-test-", suffix=".tmp", dir=".")) atexit.register(shutil.rmtree, self._tmpdir) - + self._config['ssh_key'] = \ + open(self._config['ssh_key_file']).read().rstrip() + self._config['ssh_pub_key'] = \ + open(self._config['ssh_pub_key_file']).read().rstrip() self._ssh_key_file = os.path.join(self._tmpdir, "id_rsa") - open(self._ssh_key_file, "w").write(SSH_KEY) + open(self._ssh_key_file, "w").write(self._config['ssh_key']) subprocess.check_call(["chmod", "600", self._ssh_key_file]) self._ssh_pub_key_file = os.path.join(self._tmpdir, "id_rsa.pub") - open(self._ssh_pub_key_file, "w").write(SSH_PUB_KEY) + open(self._ssh_pub_key_file, "w").write(self._config['ssh_pub_key']) self.debug = debug self._stderr = sys.stderr @@ -80,11 +112,14 @@ class BaseVM(object): self._stdout = sys.stdout else: self._stdout = self._devnull + netdev = "user,id=vnet,hostfwd=:127.0.0.1:{}-:22" self._args = [ \ - "-nodefaults", "-m", "4G", - "-cpu", "max", - "-netdev", "user,id=vnet,hostfwd=:127.0.0.1:0-:22" + - (",ipv6=no" if not self.ipv6 else ""), + "-nodefaults", "-m", self._config['memory'], + "-cpu", self._config['cpu'], + "-netdev", + netdev.format(self._config['ssh_port']) + + (",ipv6=no" if not self.ipv6 else "") + + (",dns=" + self._config['dns'] if self._config['dns'] else ""), "-device", "virtio-net-pci,netdev=vnet", "-vnc", "127.0.0.1:0,to=20"] if vcpus and vcpus > 1: @@ -95,6 +130,25 @@ class BaseVM(object): logging.info("KVM not available, not using -enable-kvm") self._data_args = [] + def wait_boot(self, wait_string=None): + """Wait for the standard string we expect + on completion of a normal boot. + The user can also choose to override with an + alternate string to wait for.""" + if wait_string is None: + if self.login_prompt is None: + raise Exception("self.login_prompt not defined") + wait_string = self.login_prompt + self.console_init() + self.console_wait(wait_string) + + def __getattr__(self, name): + # Support direct access to config by key. + # for example, access self._config['cpu'] by self.cpu + if name.lower() in self._config.keys(): + return self._config[name.lower()] + return object.__getattribute__(self, name) + def _download_with_cache(self, url, sha256sum=None, sha512sum=None): def check_sha256sum(fname): if not sha256sum: @@ -126,7 +180,8 @@ class BaseVM(object): "-t", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=" + os.devnull, - "-o", "ConnectTimeout=1", + "-o", + "ConnectTimeout={}".format(self._config["ssh_timeout"]), "-p", self.ssh_port, "-i", self._ssh_key_file] # If not in debug mode, set ssh to quiet mode to # avoid printing the results of commands. @@ -176,15 +231,15 @@ class BaseVM(object): "virtio-blk,drive=%s,serial=%s,bootindex=1" % (name, name)] def boot(self, img, extra_args=[]): - args = self._args + [ - "-device", "VGA", - "-drive", "file=%s,if=none,id=drive0,cache=writeback" % img, - "-device", "virtio-blk,drive=drive0,bootindex=0"] - args += self._data_args + extra_args + boot_dev = BOOT_DEVICE[self._config['boot_dev_type']] + boot_params = boot_dev.format(img) + args = self._args + boot_params.split(' ') + args += self._data_args + extra_args + self._config['extra_args'] + args += ["-device", "VGA"] logging.debug("QEMU args: %s", " ".join(args)) qemu_bin = os.environ.get("QEMU", "qemu-system-" + self.arch) guest = QEMUMachine(binary=qemu_bin, args=args) - guest.set_machine('pc') + guest.set_machine(self._config['machine']) guest.set_console() try: guest.launch() @@ -331,7 +386,6 @@ class BaseVM(object): def shutdown(self): self._guest.shutdown() - def wait(self): self._guest.wait() @@ -379,15 +433,17 @@ def parse_args(vmcls): parser.disable_interspersed_args() return parser.parse_args() -def main(vmcls): +def main(vmcls, config=None): try: + if config == None: + config = {} args, argv = parse_args(vmcls) if not argv and not args.build_qemu and not args.build_image: print("Nothing to do?") return 1 logging.basicConfig(level=(logging.DEBUG if args.debug else logging.WARN)) - vm = vmcls(debug=args.debug, vcpus=args.jobs) + vm = vmcls(debug=args.debug, vcpus=args.jobs, config=config) if args.build_image: if os.path.exists(args.image) and not args.force: sys.stderr.writelines(["Image file exists: %s\n" % args.image, -- 2.17.1